> make clean
> find . | xargs touch -t 198001010101
> make
> find . -not atime -1 | xargs rm $i
>
> Which would set all of the access times to be really old,
> rebuild everything, and then remove all files which weren't
> touched during the build.
Slight correction: make that last command
find . -not -atime -1 | xargs rm $i
and the last sentence "which weren't accessed during the build".
Still untested though :)
-jim